Plant Min Zone: 4a
Plant Max Zone: 9a
Sunlight: All Day Full Sun, Full Sun
Water / Rainfall: Average
Soil Quality: Poor, Average
Bloom Season: Late Summer, Fall
Flower Color: Purple
Berry / Fruit Color: None
Spring Foliage Color: Green, Reddish Green, Maroon
Summer Foliage Color: Green, Reddish Green, Maroon
Fall Foliage Color: Green, Reddish Green, Maroon
Evergreen Foliage: No
Winter Interest: No
Scented Flowers: No
Drought Tolerance: Medium
Wet-Feet Tolerance: Low
Humidity Tolerance: Medium, High
Wind Tolerance: Low
Poor Soil Tolerance: Rocky Soils, Sandy Soils, Shallow Soils
Height: 3' - 5'
Width: 2' - 3'
Growth Rate: Medium, Fast
Service Life: Short: 1-3 years
Maintenance Need: Medium
Spreading Potential: Low
Yearly Trimming Tips: Bulbs Do Not Need Any Trimming: Let Foliage Die Back Naturally.
Plant Grouping Size: Specimen Planting of 1-3
Best Side of House: South Exposure, West Exposure, East Exposure
Extreme Planting Locations: Survives Under Roof Overhang, Resistant to Rabbits
Ornamental Features: Large Tropical Foliage / Flowers
Special Landscape Uses: None
Possible Pest Problems: Root Rot Disease
Plant Limitations: May Needs Staking, Unpleasant Smelling Flowers / Foliage, Short / Unreliable Blooming Season
Shippable in 2026: YES
Giant Allium (Allium giganteum) is perhaps the tallest of the ornamental onions at 3-4'. A giant purple globe adorns each leafless stalk. The spectacular show lasts a couple weeks with the hopes of no thunderstorms. Allow the foliage to grow and die back naturally as with any perennial bulbs. And as with all alliums, these are completely rabbit proof.